Gene Information
Gene NameKRT4
OrganismHomo sapiens (Human)
Gene Length520
Protein NamesKeratin, type II cytoskeletal 4 (Cytokeratin-4) (CK-4) (Keratin-4) (K4) (Type-II keratin Kb4)
Target NameNA
Target TypeNA
Gene Age382 ( ENSG00000170477 )
Evolutionary StageEukaryota
AlphaFoldDBP19013
Gene CardKRT4
Uniprot IDP19013
PfamPF00038; PF16208
In ASDno
Allosteric Predictionno (-1.619613687)
Ortholog in AnimalsAlpaca_ KRT4 ( ortholog_one2one )
GuineaPig_ KRT4 ( ortholog_one2one )
Macaque_ KRT4 ( ortholog_one2one )
Mouse_ Krt4 ( ortholog_one2one )
Pig_ KRT4 ( ortholog_one2one )
Rat_ Krt4 ( ortholog_one2one )
OhnologsKRT33A, GFAP, KRT19, KRT15, KRT10, KRT17P2, KRT16, KRT14, VIM, DES
ParalogsVIM, KRT12, KRT74, INA, NEFM, KRT39, SYNM, KRT13, KRT80, KRT33B, KRT31, KRT77, KRT26, KRT32, KRT73, KRT28, KRT37, KRT38, KRT6B, KRT6A, KRT6C, KRT72, KRT20, KRT5, KRT222, LMNB1, PRPH, KRT23, KRT36, KRT7, KRT34, KRT75, KRT25, KRT76, KRT35, KRT78, KRT24, KRT40, KRT86, KRT83, KRT81, NES, DES, KRT2, KRT9, KRT27, KRT3, KRT84, LMNB2, KRT33A, KRT82, BFSP2, KRT14, KRT16, KRT85, LMNA, KRT8, GFAP, KRT17, KRT79, KRT71, KRT1, KRT19, LMNTD1, NEFL, KRT15, KRT18, KRT10
Tissueesophagus, tongue, esophagus.mucosa
Tissue SpecificityDetected in the suprabasal layer of the stratified epithelium of the esophagus, exocervix, vagina, mouth and lingual mucosa, and in cells and cell clusters in the mucosa and serous gland ducts of the esophageal submucosa (at protein level). Expressed widely in the exocervix and esophageal epithelium, with lowest levels detected in the basal cell layer. {ECO:0000269|PubMed:2452170}.
Pharmacological Animal ModelsNA
Gene Ontology
(biological process)
Gene Ontology
(cellular component)
Gene Ontology
(molecular function)
PDB NA 
DBSNP rs2638525  rs62642055 
Subcellular location [CC]NA
Mouse PG classificationHPG
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